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manicm8
Asked: 2013-04-27 18:21:39 +0800 CST

Screen brightness very dim on a Dell XPS 13 (2013)

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I just installed Xubuntu 13.04 on a new Dell XPS 13 Ultrabook. When I boot up the screen brightness is EXTREMELY dim. Adjusting the screen brightness doesn't do anything. This is obviously a very new bug with 13.04.

Any ideas?

dell

2 Answers

  1. here are a couple kernel boot parameters you can try

    • acpi_osi=Linux
    • acpi_backlight=vendor
    • acpi_osi='!Windows 2012'


    This is there you add that code, I had to use the 3ed one to get mine working right, it may be necessary to use 1 or 3 combined with the second one
    The file to edit is :
    /etc/default/grub
    once you edit it run sudo update-grub then reboot

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  2. Along with @GM-Script-Writer-62850's answer, if you're using an EFI BIOS boot, you ned to go into the BIOS setup and set "Load Legacy Rom" to Enabled.

    I have experimented with the minimal GRUB line to get this working and I only need acpi_osi=Linux

    AFAIK Legacy is anything not Windows 8, and I've not experienced any performance hit.

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